(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

A particle was originally in a 1D potential box of length L and in its ground state. However, the walls of the box expanded symmetrically to 2L suddenly. Calculate the probability of the particle remaining in its ground state.

2. Relevant equations

[tex]\psi[/tex](x) = [tex]\sqrt{\frac{2}{L}}[/tex] sin ([tex]\frac{n\pi x}{L}[/tex])

3. The attempt at a solution

When I checked https://www.physicsforums.com/showthread.php?t=68816", the answer seems to be (8/3pi)^2... Can anyone guide me as to what is wrong with my working?

Please pardon my handwriting...

Thanks!

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# Homework Help: Particle in Expanded 1D Box

Can you offer guidance or do you also need help?

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